I'm a big fan of date slice. Delicious, plus it has lots of dates and oats.
I'm looking for other ideas for traybakes where a significant proportion is really nutritious. Things with nuts, seeds, dried or fresh fruit, oats, maybe even lentils!
I have lots of recipes that contain these things, but (apart from the date slice) none where the nutritious ingredients make up a good half of the whole.
Any ideas?